20377557177 has 8 divisors (see below), whose sum is σ = 27170820864. Its totient is φ = 13584665808.

The previous prime is 20377557169. The next prime is 20377557203. The reversal of 20377557177 is 77175577302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20377557177 - 2³ = 20377557169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20377557877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81303 + ... + 217635.

It is an arithmetic number, because the mean of its divisors is an integer number (3396352608).

Almost surely, 2^20377557177 is an apocalyptic number.

It is an amenable number.

20377557177 is a deficient number, since it is larger than the sum of its proper divisors (6793263687).

20377557177 is a wasteful number, since it uses less digits than its factorization.

20377557177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186159.

The product of its (nonzero) digits is 2521050, while the sum is 51.

The spelling of 20377557177 in words is "twenty billion, three hundred seventy-seven million, five hundred fifty-seven thousand, one hundred seventy-seven".